CN105617841A - Ship tail gas desulfurization and ship ballast water integrated treatment technology - Google Patents
Ship tail gas desulfurization and ship ballast water integrated treatment technology Download PDFInfo
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- CN105617841A CN105617841A CN201511012884.3A CN201511012884A CN105617841A CN 105617841 A CN105617841 A CN 105617841A CN 201511012884 A CN201511012884 A CN 201511012884A CN 105617841 A CN105617841 A CN 105617841A
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- ballast
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- ballast water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 36
- 230000023556 desulfurization Effects 0.000 title claims abstract description 34
- 238000011282 treatment Methods 0.000 title abstract description 15
- 238000005516 engineering process Methods 0.000 title abstract description 10
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims abstract description 60
- 239000007789 gas Substances 0.000 claims abstract description 40
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 36
- 239000001301 oxygen Substances 0.000 claims abstract description 36
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 33
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 23
- 235000010265 sodium sulphite Nutrition 0.000 claims abstract description 21
- 238000005273 aeration Methods 0.000 claims abstract description 14
- 239000011734 sodium Substances 0.000 claims abstract description 14
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 13
- 239000003513 alkali Substances 0.000 claims abstract description 13
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 13
- 238000010521 absorption reaction Methods 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 10
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 6
- 229910052938 sodium sulfate Inorganic materials 0.000 claims abstract description 6
- 235000011152 sodium sulphate Nutrition 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 230000001954 sterilising effect Effects 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 48
- 238000001914 filtration Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 12
- 238000012545 processing Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 206010003497 Asphyxia Diseases 0.000 claims description 3
- 238000005189 flocculation Methods 0.000 claims description 3
- 230000016615 flocculation Effects 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 2
- 239000006227 byproduct Substances 0.000 abstract description 7
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000002028 Biomass Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 18
- 241000195493 Cryptophyta Species 0.000 description 6
- 230000002147 killing effect Effects 0.000 description 5
- 239000013535 sea water Substances 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 241000206761 Bacillariophyta Species 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- 241000227752 Chaetoceros Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 241000199914 Dinophyceae Species 0.000 description 1
- 241000194033 Enterococcus Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 241000206732 Skeletonema costatum Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 241000607626 Vibrio cholerae Species 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000003385 bacteriostatic effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- SXDBWCPKPHAZSM-UHFFFAOYSA-M bromate Inorganic materials [O-]Br(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-M 0.000 description 1
- SXDBWCPKPHAZSM-UHFFFAOYSA-N bromic acid Chemical compound OBr(=O)=O SXDBWCPKPHAZSM-UHFFFAOYSA-N 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- HRYZWHHZPQKTII-UHFFFAOYSA-N chloroethane Chemical compound CCCl HRYZWHHZPQKTII-UHFFFAOYSA-N 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- -1 haloform) Chemical compound 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229940118696 vibrio cholerae Drugs 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/008—Originating from marine vessels, ships and boats, e.g. bilge water or ballast water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention belongs to the technical field of ship tail gas desulfurization and ballast water treatment and environmental protection, and particularly relates to a ship tail gas desulfurization and ship ballast water integrated treatment technology. According to the technology, low energy consumption, high efficiency and reliable operation can be achieved, and the purpose that ship ballast water is deoxidized is achieved by fully utilizing a desulfurization by-product sodium sulfite. The technology comprises the following steps that ship tail gas enters a sodium alkali absorption tower, and SOX is absorbed and removed through a sodium hydroxide solution; the sodium hydroxide solution absorbs the SOX to generate a sodium sulfite solution; biomass and impurities in the ballast water are removed through a filter, the filtered ballast water is mixed with the sodium sulfite solution, the ballast water mixed with sodium sulfite is processed through ultraviolet sterilization and then enters a ship ballast tank; in the ballast tank, sodium sulfite and dissolved oxygen in the ballast water are gradually subjected to a reaction to generate sodium sulfate, and meanwhile the ballast water is deoxidized; when the ballast water is drained, ultraviolet sterilization is firstly performed, and then air is injected into the ballast water in a drain pipeline to achieve aeration.
Description
Technical field
The invention belongs to ship tail gas desulfurization/ballast water treatment and environmental technology field, particularly relate to a kind of ship tail gas desulfurization and ballast water for ship integrated processing technique.
Background technology
Boats and ships shipping assume responsibility for the trade freight volume in the whole world 90%, and CO2Quantity discharged only account for the whole world total release 1.8%. Therefore, boats and ships shipping is the mode of transport comparatively green relative to aviation and land route transport. Along with the fast development of whole world boats and ships shipping-trade, the pollution that air is caused by the tail gas of boats and ships discharge is also on the rise, and wherein the most representative example is exactly the oxysulfide (SO of boats and ships dischargex) not only seriously affect HUMAN HEALTH, also can cause acid rain, destroy the world's ecosystems. Except atmosphere polluting problem, the great attention that the ocean invasive plants that ballast water for ship causes spreads through sex intercourse and endangers and cause international community already. Ballast water for ship is the water and suspended substance thereof that aboard ship install additional for control boats and ships trim, heel, drinking water, stability or stress. When boats and ships are unloaded or part cargoes and under severe sea conditions, boats and ships ensure the safety of navigation by loading water ballast, can by the discharge of ballast water of loading to load goods when boats and ships arrive object harbour, the strange land discharge of such ballast water for ship just becomes the main approach causing harmful organism propagation between geographic isolation water body.
In order to prevent the atmospheric pollution that boats and ships cause and the harm that effectively ocean environment is caused by control ocean exotic invasive biology, International Maritime Organizaton (IMO) has formulated a series of oil pollution from vessels pact and has discharged, with the discharge and control ballast water for ship strange land limiting ship tail gas, the ocean invasive plants caused. In order to meet IMO to ship tail gas SOxEmission limit and to the emission standard of ballast water treatment, it is necessary to the SO in boats and ships emissionxProcess with water ballast.
At present, desulfurization technology mainly contains gypsum method, rotary spraying and drying method, seawater method, sodium alkali etc. Gypsum method utilizes lime stone slurry to absorb SO2Generate CaSO3, it is CaSO through oxidation transformation4Discharge and regain, but have that initial investment is big, occupation area of equipment is big, system complex, need to lay in the problems such as Wingdale aboard ship. Rotary spraying and drying method utilizes rotating spraying absorption tower to be contacted with white lime slurries by the tail gas of atomization to carry out desulfurization, but the problem such as it is not high to there is desulfuration efficiency, the easy burn into occluding device of desulfurization after product. Seawater method utilizes the basicity of seawater self to absorb SO2, the method is substantially give ocean by pollution transportation, and current part country forbids using this method within the scope of they 200 nautical miles. Sodium alkali utilizes NaOH to absorb SO2Generate Na2SO3, it is harmless Na through oxidation transformation2SO4Discharge or recovery, this method is the method for the main flow of current desulfurization, has been successfully applied in ship tail gas desulfurization process.
Real ship application, the ballast water treatment technology that meets D-2 standard can mainly comprise co-electrolysis method of filtering, filter associating ozone method, filter associating ultraviolet and process method (patent No. CN101948204A), filtration combined deoxidation method etc. Their common ground is that front end all adopts filtering technique, and filtering accuracy, generally at 50 ��m, is greater than biology and the impurity of 50 ��m in order to remove volume, the difference is that filter after take different process technology. The main problem that electrolytic process exists is that working concentration is at least greater than 2mg/L, otherwise on capsule spore almost invalid, produce chemical by-product (such as hydrochloric ether, haloform), hydrogen that process effect produces by the impact of sea water salinity, electrolysis need to carry out gas-liquid separation, otherwise can cause hidden peril of explosion. The main problem that ozone method exists be comparatively large vol microorganism effect is not obvious, need enough spaces to deposit ozonizer, produce HUMAN HEALTH to be had chemical by-product, the energy consumption height such as the bromate of potential hazard, methenyl bromide. The greatest problem that ultraviolet method exists is that killing effect is relevant with UV line penetrance in water, and only comparatively clean water and the silica tube without dirt just can reach good killing effect. Deoxidation method is by the water ballast after deoxidation is deposited in ballast tank of ship, so method researches and develops for ballast water treatment specially. Deoxidation method while killing organism in water, also because the dissolved oxygen reduced in water decreases the corrosion of hull.
In sum, it is no lack of at present and has independent ship tail gas sulfur method and equipment (or system), and separately cruising ballast water treatment process and equipment (or system). If with respectively tail gas desulfurization and the ballast for cruising water treatments of two cover systems, not only floor space is big, and invest, process cost height. Therefore can the method for desulfurization and Treatment of Ships'Ballast Water will be expected simultaneously. At present, there is no and simultaneously ship tail gas desulfurization can take into account the method for ballast for cruising water treatment. Therefore, research and develop efficient, energy-conservation boats and ships desulfurization and water ballast integrated equipment for wastewater treatment has reality and great meaning.
Summary of the invention
In order to solve the problem, the present invention provides a kind of ship tail gas desulfurization and ballast water for ship integrated processing technique, this technique can realize less energy-consumption, high-level efficiency, reliability service, makes full use of the object that desulfurizing byproduct S-WAT reaches deoxidation treatment ballast water for ship.
A kind of ship tail gas desulfurization and ballast water for ship integrated processing technique, it comprises the following steps:
(1) desulfurization of sodium Alkali absorption obtains S-WAT
Ship tail gas enters sodium Alkali absorption tower by sodium hydroxide solution by SOXAbsorbing and removing, washs the PM in ship tail gas simultaneously, and the ship tail gas after purification discharges; Sodium hydroxide solution absorbs SOXRear formation sodium sulfite solution;
(2) water ballast filtration, deoxidation and sterilization
Water ballast removes the biology in water and impurity through strainer, and the water ballast after filtration mixes with the sodium sulfite solution in step (1), and the water ballast of mixing S-WAT enters ballast tank of ship after ultraviolet-sterilization; In ballast tank, S-WAT progressively occurs reaction to generate sodium sulfate with ballast oxygen in water, makes water ballast deoxidation simultaneously, makes its death by suffocation by the planktonic organism living environment in change water ballast;
(3) discharge of ballast water
During discharge of ballast water, first through ultraviolet-sterilization, then in the water ballast in discharge pipe, inject air and realize aeration, discharge after the dissolved oxygen content of water ballast is raised.
It is characterised in that further, and in step (1), sodium hydroxide solution absorbs SOXThe sodium sulfite solution of rear formation removes, through precipitation, flocculation, the PM retained in the solution, obtains clean sodium sulfite solution and mixes with the water ballast in step (2), and PM collects and turns bank process;
In step (2), water ballast removes the biology and the impurity that are greater than 50 ��m through filter, and the biology of filtering and impurity flow back to water intaking marine site;
In step (2) and (3), ultraviolet-sterilization kills, by UV disinfection unit, hold concurrently in water ballast oxygen or anerobe, UV disinfection unit UV wavelength range 200nm-380nm, uv dosage 18-20mJ//cm2;
Step (3) is injected air in the water ballast in discharge pipe realized by air aeration head or Venturi tube;
In step (2), water ballast arranges dissolved oxygen monitor detection dissolved oxygen content with sodium sulfite solution before mixing, and arranges dissolved oxygen monitor detection dissolved oxygen content in step (3) before aeration.
After adopting the technique of the present invention, by the technique of ship tail gas sodium Alkali absorption desulfurization, ballast for cruising water filtration, deoxidation, ultraviolet-sterilization, aeration, achieve ship tail gas purification close-coupled processing with water ballast, ship tail gas sulphur oxide and water ballast meet the emission standard of IMO, the present invention utilizes the by product S-WAT after sodium alkali desulfurization and the reaction of ballast oxygen in water to generate sodium sulfate, both achieved de-except the dissolved oxygen in water ballast, S-WAT is made again to turn into sodium sulfate innoxious substance, can directly arrange sea, it is achieved that less energy-consumption, high-level efficiency, reliability service; Further, the present invention discharge water ballast time through UV disinfection unit, can effectively kill hold concurrently in water ballast oxygen or anaerobic type microorganism, guarantee that the water ballast of discharge meets the emission standard of IMO, the setting of dissolved oxygen monitor, one can regulate the amount of S-WAT according to ballast content of oxygen dissolved in water, the dissolved oxygen in effective elimination water ballast can be guaranteed further, another can regulate aeration air inlet amount according to discharge ballast content of oxygen dissolved in water, guarantee that discharge ballast oxygen in water returns to normal level, ocean environment can not be caused harm.
Accompanying drawing explanation
Fig. 1 step of the present invention (1) and (2) schematic flow sheet;
Fig. 2 is step of the present invention (3) schematic flow sheet;
Fig. 3 is aerating system structural representation of the present invention.
Embodiment
See Fig. 1, shown in Fig. 2, the technique that a kind of ship tail gas desulfurization and ballast water for ship process simultaneously, it comprises the following steps:
(1) desulfurization of sodium Alkali absorption obtains S-WAT
Ship tail gas enters sodium Alkali absorption tower, drenches sodium hydroxide solution by SO by sprayXAbsorbing and removing, washs the objectionable impuritiess such as the PM in ship tail gas simultaneously, and the ship tail gas after purification discharges through vapor pipe; Sodium hydroxide solution absorbs SOXRear formation sodium sulfite solution; Sodium sulfite solution is removed washing tail gas retain PM in the solution through precipitation, flocculation, obtains clean sodium sulfite solution, and the enrichment contaminant collectings such as PM also turn bank process;
(2) water ballast filtration, deoxidation and sterilization
Water ballast removes the biology and the impurity that are greater than 50 ��m in water through strainer, the biological impurities of filtering flows back to water intaking marine site, biological strange land is avoided to pollute, water ballast after filtration mixes with the sodium sulfite solution in step (1), and the water ballast of mixing S-WAT enters ballast tank of ship after ultraviolet-sterilization; In ballast tank, S-WAT progressively occurs reaction to generate sodium sulfate with ballast oxygen in water, makes water ballast deoxidation simultaneously, makes its death by suffocation by the planktonic organism living environment in change water ballast; Dissolved oxygen in seawater is that 5-8mg/ is when rising, the injection rate of Theoretical Calculation sodium sulphite anhydrous 99.3 is 40-64mg/ liter, actual injection rate is 1-1.3 times of Theoretical Calculation amount, and the time of killing is 48 hours, and the injection rate of sodium sulfite solution can draw by the Calculation of Solubility under differing temps.
(3) discharge of ballast water
During discharge of ballast water, first through ultraviolet-sterilization, then in the water ballast in discharge pipe, inject air and realize aeration, making the dissolved oxygen content of water ballast raise (dissolved oxygen discharged in water ballast returns to the normal level that 5-8mg/ rises) to discharge afterwards, aeration is realized by air aeration head or Venturi tube.
In step (2) and (3), ultraviolet-sterilization kills, by UV disinfection unit, hold concurrently in water ballast oxygen or anerobe, UV disinfection unit UV wavelength range 200nm-380nm, uv dosage 18-20mJ//cm2��
In step (2), water ballast arranges dissolved oxygen monitor detection dissolved oxygen content with sodium sulfite solution before mixing, and arranges dissolved oxygen monitor detection dissolved oxygen content in step (3) before aeration.
A kind of structure that Fig. 3 specifically adopts when being aeration of the present invention, but it is not limited to said structure.
Following illustrate further according to a specific embodiment:
Water ballast is tested former water and is taken from from 20 nautical miles, Yang Shan deep water port harbour, original dissolved oxygen content: 7.55mg/L in water; Water temperature 26.2oC, owing to the biological content in natural waters >=50um can not meet the former water requirement of test, so before experiment starts each simulation ballast tank with the addition of enrichment after natural community biological, the biological density of former water reaches 1.26 �� 105Individual/m3. Through adding diatoms crescent cylinder post algae, the biological initial density of 10 ~ 50um reaches 1.39 �� 105Cells/mL, meets D-2 standard (10 completely3~104Cells/mL) density requirements of land-based test. Main sociales are the first algae such as diatoms and primitive nail algae, unarmored dinoflagellate and circular groove algae such as crescent cylinder post algae, middle Skeletonemacostatum, Chaetoceros.
During test, the strainer that first water ballast is 50 ��m through precision injects S-WAT saturated solution 1 times of Theoretical Calculation amount (addition be) after filtering on the supervisor road of water ballast, adopts UV wavelength range 200nm-380nm, uv dosage 18-20mJ//cm2UV disinfection unit water ballast is processed, then enter simulation water ballast tank.
When 120h samples, without the >=any living body biological of 50um in sample.
The time period that diameter is less than the algae change of 50 ��m violent is 0 ~ 12h and 12h ~ 24h, and cell quantity rapid reduction, 48h ~ 120h is all in and meets D-2 standard-required.
Poisonous vibrio cholerae (O1 and O139) all non-detection at the end of former water and test; Intestinal bacteria are found (3.6x10 in former water and 12h2Cfu/100ml), all the other times non-detection; Enterococcus bacteria is non-detection between whole experiment periods.
Compared to prior art, the benefit of the present invention is to make full use of tail gas desulfurization by product resource, in conjunction with sodium Alkali absorption, S-WAT deoxy technology, first ship tail gas desulfurization and ballast water treatment are combined, it is a kind of brand new ideas of ship tail gas desulfurization simultaneously and ballast water treatment technical field. SO in emissionXIt is removed through sodium Alkali absorption tower, by desulfuration byproduct S-WAT by the dissolving oxygen removal in water ballast, add that ultraviolet is to the killing action of double oxygen and anaerobion, it is enough to make the biology in water ballast and anoxic microbial to suffocate and die, achieve the microorganism to remnants, bacteriostatic growth and kill, make it to meet IMO discharge of ballast water standard. This technique has that efficent use of resources, less energy-consumption, high-level efficiency, safe and reliable operation, floor space are little, the feature of environmental protection, the novel process of ship tail gas desulfurization and ballast for cruising water treatment while of being have applications well prospect and new system.
Claims (6)
1. a ship tail gas desulfurization and ballast water for ship integrated processing technique, it is characterised in that, it comprises the following steps:
(1) desulfurization of sodium Alkali absorption obtains S-WAT
Ship tail gas enters sodium Alkali absorption tower by sodium hydroxide solution by SOXAbsorbing and removing, washs the PM in ship tail gas simultaneously, and the ship tail gas after purification discharges; Sodium hydroxide solution absorbs SOXRear formation sodium sulfite solution;
(2) water ballast filtration, sterilization and deoxidation
Water ballast removes the biology in water and impurity through strainer, and the water ballast after filtration mixes with the sodium sulfite solution in step (1), and the water ballast of mixing S-WAT enters ballast tank of ship after ultraviolet-sterilization; In ballast tank, S-WAT progressively occurs reaction to generate sodium sulfate with ballast oxygen in water, makes water ballast deoxidation simultaneously, makes its death by suffocation by the planktonic organism living environment in change water ballast;
(3) discharge of ballast water
During discharge of ballast water, first through ultraviolet-sterilization, then in the water ballast in discharge pipe, inject air and realize aeration, discharge after the dissolved oxygen content of water ballast is raised.
2. a kind of ship tail gas desulfurization according to claim 1 and ballast water for ship integrated processing technique, it is characterised in that, in step (1), sodium hydroxide solution absorbs SOXThe sodium sulfite solution of rear formation removes, through precipitation, flocculation, the PM retained in the solution, obtains clean sodium sulfite solution and mixes with the water ballast in step (2), and PM collects and turns bank process.
3. a kind of ship tail gas desulfurization according to claim 1 and ballast water for ship integrated processing technique, it is characterised in that, in step (2), water ballast removes the biology and the impurity that are greater than 50 ��m through filter, and the biology of filtering and impurity flow back to water intaking marine site.
4. a kind of ship tail gas desulfurization according to claim 1 and ballast water for ship integrated processing technique, it is characterized in that, in step (2) and (3), ultraviolet-sterilization kills, by UV disinfection unit, hold concurrently in water ballast oxygen or anerobe, UV disinfection unit UV wavelength range 200nm-380nm, uv dosage 18-20mJ//cm2��
5. a kind of ship tail gas desulfurization according to claim 1 and ballast water for ship integrated processing technique, it is characterised in that, step (3) is injected air in the water ballast in discharge pipe and is realized by air aeration head or Venturi tube.
6. a kind of ship tail gas desulfurization according to claim 1 and ballast water for ship integrated processing technique, it is characterized in that, in step (2), water ballast arranges dissolved oxygen monitor detection dissolved oxygen content with sodium sulfite solution before mixing, and arranges dissolved oxygen monitor detection dissolved oxygen content in step (3) before aeration.
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